I soloed all the trash up to Onyxia, but then the server shut down about 5 minutes into fighting Onyxia herself. I tried to solo Durn, but I didn't get very far. He just does way too much damage to try to heal through.
Not that it's terrible impressive, but I was trying to figure out exactly how good protection had gotten with the patch. It seems that there are very few normal instances that a crappily geared pally can't do solo now. I tried Shattered Halls and CoTurnholde last night, and did fairly well. The only parts I had problems with were the five pulls with two casters in SH and the damn priests with Psychic Scream in Durnholde. I'll probably try Blood Furnace or Steamvaults tonight.